U.S. Sen. Elizabeth Warren recounts in her new autobiography that she was “hurt” and “angry” by news reports that there was no documentation to support her claims of her family’s Cherokee heritage in the 2012 Senate race, according to a published report.

“What really threw me, though, were the constant attacks from the other side,” Warren wrote, according to Politico.com, which received an advance copy of Warren’s book, “A Fighting Chance,” due to be released April 22.

“I would almost persuade myself that I was starting to get the hang of full-throttle campaigning and then — bam! Out of left field, the state Republican Party, or the Scott Brown campaign, or some blogger, would launch a rocket at me,” Warren wrote.

The Herald first reported that Indian tribes had no record of membership by Warren, and that genealogists were unable to confirm any Native American heritage. It later emerged that Warren had listed herself as a minority in the nation’s leading directory of law professors for a period of a decade as she moved up in academia, and she was ultimately cited by Harvard University as a minority hire.

Efforts to reach a Warren spokeswoman yesterday were unsuccessful.

Though only a freshman senator, Warren has emerged as a liberal darling, jetting around the country as a popular speaker and fundraiser for Democratic candidates. Warren has been repeatedly mentioned as a leading Democratic contender for the 2016 presidential race if Hillary Clinton decides not to run. Warren has repeatedly downplayed the prospect of a 2016 run. The unresolved Native American question is seen as a potential campaign issue.

Politico said Warren admitted she initially “fumbled” when reporters first asked her about it.

When Brown picked up the drumbeat, Warren said, “He attacked my dead parents. I was hurt, and I was angry.”

“I was stunned by the attacks.”

Politico’s report recites Warren’s oft-repeated claim of family lore, without any new documentation: “Everyone on our mother’s side — aunts, uncles, and grandparents — talked openly about their Native American ancestry. My brothers and I grew up on stories about our grandfather building one-room schoolhouses and about our grandparents’ courtship and their early lives together in Indian Territory.”

The article also states Warren was “confused” when the media jumped on her claim of inspiring the Occupy movement.

“There must have been a mistake — right?” Warren said she thought, before learning from an aide she had been correctly quoted as saying: “I created much of the intellectual foundation for what they do.”

Warren acknowledged, “My words sounded so puffy and self-important, and they made it seem as if I were trying to take credit for a protest I wasn’t even part of.”